I'm self-publishing a book, writing it in MS Word 2007, creating my graphics in CorelDraw X4 and Adobe Illustrator, printing music (yes, it's a music book) in Finale 2009. All my graphics are B&W and not very complicated, very little grey tones (just a few files), but for the most part, all black and white.

I'm trying to decide on the best format for everything to make it easy to create both a rough draft in Word and then later, in Adobe InDesign.

What DPI do I need for really crisp graphics so I don't have to redo them later? A printer told me commercial level graphics are 1200 dpi.

In Coreldraw, I export to MS Office set to commercial level. That is PNG at 300 dpi, I believe. I can also export as TIFF, and PDF. I use Adobe PDF for full page text (music.) My music program exports both TIFF and or EPS.

If I sound like I don't quite know what I'm doing, you have strong powers of observation.

What is the easiest (but good quality) file format to use for graphics between Microsoft Office and Adobe...and what dpi resolution do I want to use?